Used the config-rs crate to allow reading from a config file from /etc/zealot/config.toml and from the home directory

src/settings.rs

@@ -0,0 +1,12 @@
+use config::Config;
+
+pub fn load_config() -> Config {
+  let settings = Config::builder()
+    // Add in `./Settings.toml`
+    .add_source(config::File::with_name("/etc/zealot/config.toml").required(false))
+    .add_source(config::File::with_name(&shellexpand::tilde("~/.config/zealot.toml")).required(false))
+    .build()
+    .unwrap();
+
+  return settings;
+}